Summary list of areas in western, northern, and central Illinois recommended for special investigation as possibly suitable for strip-mining
By: by Gilbert H. Cady
Series: Information circular / Illinois Geological Survey -- no. 19; Information circular (Illinois State Geological Survey) -- no. 19.
Publisher: State of Illinois, Dept. of Registration and Education, Geological Survey Division
Published: 1937
Place of publication: Urbana, Ill
Language: eng
Subjects: Strip mining; Coal mines and mining
Notes: "Feb. 8, 1937."